This is a question specifically about English language usage in mathematics, but it is probably the same in all topics (however I can't really think of an example in everyday life!).
Should I say "A is conjugate to B" or "A is conjugate with B"? I'm pretty sure "A is the conjugate of B" is acceptable, but I think (at least one) of the previous is also correct.
I'm referring to "conjugate" as in "subgroups are conjugate".